Exchange Interactions and Curie Temperature of Y–Co Compounds

Authors

Arti Kashyap, University of Nebraska-Lincoln
Ralph Skomski, University of Nebraska-Lincoln
Renat F. Sabirianov, University of Nebraska at OmahaFollow
Sitaram S. Jaswal, University of Nebraska-Lincoln
David J. Sellmyer, University of Nebraska-Lincoln

Document Type

Article

Publication Date

9-2003

Publication Title

IEEE TRANSACTIONS ON MAGNETICS

Volume

39

Issue

5

First Page

2908

Last Page

2910

Abstract

The Curie temperature of rare-earth Co intermetallics is investigated by self-consistent spin-polarized electronic-structure calculations on Y–Co compounds. The total exchange interaction of a given site with all other sites (J_o) is calculated by the linear-muffin-tin-orbital method using the local force theorem and employed to obtain mean-field Curie-temperature estimates. The theoretical predictions for YCo₃, YCo₅, and Y₂Co₁₇ are in fair agreement with the experimental Curie temperatures. For YCo₅, the variation of exchange interactions (J_ij) with distance is analyzed, and it is discussed how the presence of nonequivalent cobalt sites affects the Curie temperature of the compounds.

Comments

Published in IEEE TRANSACTIONS ON MAGNETICS, VOL. 39, NO. 5, SEPTEMBER 2003, pp. 2908-2910. Digital Object Identifier 10.1109/TMAG.2003.815744 Used by permission. http://www.ieee.org/portal/pages/pubs/transactions/tm.html "©2003 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE."

Recommended Citation

Kashyap, Arti; Skomski, Ralph; Sabirianov, Renat F.; Jaswal, Sitaram S.; and Sellmyer, David J., "Exchange Interactions and Curie Temperature of Y–Co Compounds" (2003). Physics Faculty Publications. 48.
https://digitalcommons.unomaha.edu/physicsfacpub/48